Adult PC Game: The princess of Succubus Final by Circle Database English Archive

Succubus have been catching men of human kinds to suck their semen.
Human kinds bring tentacle monster that can fight against succubus with them and
attack the village of succubus.
Succubus became feeds of tentacle monster, and then became sexual slaveries.
Succubus' village fell.

the princess succubus was the only one who can escape from the village.
In order to help succubus who become the sexual slaveries,
the princess succubus begins the erotic journey.